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MICHAEL LOUGHRAN, OF PITTSBURG, PENNSYLVANIA. Letters Patent No. 72,512, datedll'eccnzber 24, 1867.

I'IlltII'ROVED MACHINE FOR ROLLING GLEVIS-BLANKS.

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TO ALL WHOM IT MAY CONOERN:

Be it known that I, MICHAEL LouoHnAN, of the eity ot Pittsburg, inthe county-of Allegheny, and State of Pennsylvania, have invented a new and useful-'Improvement in Rolls for Making (.llevis-Blanks; and I do hereby declare the following to be a full,vclear, and exact description' thereof, reference being had to the accompanying drawings, making a part of this specification, in which- Figure 1 is a front view of a pair ofmy improved rolls, and

Figure 2 is a cross-section, formed by a plane passing vertically through the rolls in the vline rcx, g. 1, and also illustrating their mode of operating, byshowing the position of a bar `while passingthroughbetween the rolls.

Like letter-s of referencey indicate like parts. i 1

The nature of my invention consists in 'the construction of cylindrical-rolls with an arrangement of groovesl and notches in their outer cylindrical surfaces, whereby a rod or bar of iron, having a cross-section other than circular or square, lwill, when passed through between such rolls, be rolled into the shape required for clevisblanks, from which to manufacture plough andother similar `clevis'es. The distinguishing characteristic of such clevises is the peculiar shape of the head which fits over the end'of the plough-beam. Such .head is usuallyforme'd-with one or more notches, in any one of which to place the ring by which the swingle-tree or doubletrees are connected to the plough, so that, bysetting the ring :in a higher orvlower notch, the depth of the furrow is regulated. Such clevises have heretofore been manufactured usually by forging and by hand. By my invention, I propose to roll elevis-blanks ofA such shape that clev'ises can be rapidlyand easily made therefrom, nothing, in fact, being required to complete' the clevis, after the blanks are rolled, except cutting them apart, and bending and punching.

l To enable others skilled-in the art to make and use my inv and mode of operation. l l

i The rolls a d are of any known material ordinarily used forsuch purposes, cylindrical in form, except that one, a', has a iattened groove, b, extending entirely around it; and the other, a, has one, two, or more, short grooves, c, running across its surface at right angles, or nearly so, Vto the 4line of its axis. l In'the bdttom of each of such grooves c are one or more notches, z', of depth and sizesuch as, to form the projecting lips e of the clevis-blank as thebar oZ is passed through between the rolls'a a. The bead f is, at the same time, shaped by the groove c, Iand the strap g ofpthe blankhin the groove b of the roll a', and between the bottom of it and the cylindrical face o'f its opposite roll, a. The rollsa a are set in proper journals, and operated by gear-wheels, k h', or by any other equivalent well-known device. D

At the proper point for inserting the bar d between the rolls a a, and so that it will strike'the grooves and notches described, IV place a guide, consisting of a mortised block, attached to the frame m, which carries the rolls a a, or, more commonly, as shown in the drawings, of two guiding-plates or blocks, n it, 'concave on their ention, I will proceed to describe its `construction inner face, so as to leave an aperture, Z, such guiding-blocks being set in andrheld by the cross-bar o, attached to the frame m.=- I commonly fit the guiding-blocks n to or in the cross-bai o insuch way that they can readily be removed and other guides inserted', by which a larger or smaller aperture, Z, is secured at pleasure. Through such aperturel I feed a bar or rod of iron of any desirable shape other than those the cross-sections of; which are either circular or square.' ySuch bar, when passing through the rolls, should have the longest axis' of its cross-section at right angles, or nearly so, to the direction of the axes of the rolls a a. 'I usually prefer a rodv or'bar of elliptical, lozenge-shaped, or rectangular cross-section, though bars of other forms may be rolled, as above stated. ',lflie aperture Zshould correspond so far in shape to the bar d that Vthelatter, while passing through between the rolls a a', will be retained in the position indicated, with the longest axis of its cross v section at right angles to the axes of the rolls. Such bar passing through between' the rolls a a', will, bythe lower roll, a', and so much of the cylindrical surface ofthe upper roll, a, as lies between the extremitiesof'the. grooves c, be rolled into tbe straps g offthe blankthe bead f and lips e being formed in the grooves c an'dnotches z', respectively, in like manner, as already described. The 'bai' thus rolled is thenl cut into separate blanks, the points of cutting being always in the strap g, and at such distances from the clevis-head, formed in the grooves c; as will leave an arm on either side of such head, of any desirable length, to be bent over or back,

into an ox-bow or clevis shape, to t theend of the plough-beam. The requisite holt-holes are then punched,

, and the clevisotherwse nshed at pleasure'. By this process, I make elevis-blenks from which to make elevises fornot only ploughs, but also cultivators, linz-rows, and other similar agricultural implements with which cleviscs of such shape are either necessary or desirable.

A s shown in the drawings, one of the grooves c has two notches ,and the other but one. I de not limit myself to any particular number, though usually, for convenience sake, I make the roll a with the snme number of notches z'in each of its grooves c; nor do I limit myself to any particular number of grooves c inthe roll a,'as there may be one, two, or more, according to 4the length of the circumference of the roll relntive to the length of the straps f of the blank to be rolled.

In order to give'the clevis a. better shape, or` facilitate' the finishing of it, I usually make the groove Znvith a. concave transverse foce, or shallower at its edges, and bevelled off toward the `middle; but, though desirable, -I do not consider the groove essential to the suceessful'operution of my invention. The roll a maybe made cylindrical throughout, its mode of operation still remaining sirlzsstnntinlly the seme'.

What I cleim as my invention, and desire to secure by Letters Patent, is

One or more grooves c in the periphery of one of'a.A pair of cylindrical rolls, with one or more notches or depressions z' in the bottom of each such groove, all of the form substantially as described, in combination with the notched or mortised guides n, for the purposes above set forth.

lIn testimony whereof, I, the said MICHAEL LOUGHRAN, have hereunto set my hand, in presence of- MICHAEL LOUGHRAN.

Witnesses:

A. S. NIcHoLsoN, Gnonen H. CHRISTY. 

